Final answer:
The amphora by Exekias does not depict Achilles in an unusual article of clothing; rather, it shows Achilles and Ajax playing a dice game in full battle gear, and the significant detail is Achilles’ heel firmly on the ground which hints at his fate in Homer's Iliad.
Step-by-step explanation:
The student has asked about the unusual article of clothing portrayed by Achilles in Exekias's Attic black figure amphora, which can be seen as a reflection of the ancient Greek myths and legends.
According to historical records and tales, when Achilles was disguised to avoid going to war, his mother dressed him in women's clothing and hid him among a princess and her court. However, the amphora does not depict Achilles wearing an unusual article of clothing. Instead, it shows both Achilles and Ajax in full battle gear, with one notable detail being that Achilles' heel is resting on the ground while they play dice. This contrasts with Ajax, whose heel is lifted slightly, and this tension reflects their fates as described in Homer's Iliad.
Moreover, the potter's attention to detail is apparent in the depiction of Achilles and Ajax through fine incised details, showing elaborate textile patterns and almost every hair in place, accentuating the moment of relaxation and contemplation as they await the next battle during the Trojan War.